package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.task.WebSocketTask;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.net.ContentHandler;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private Properties pageHelperProperties;
    @Autowired
    private WebSocketTask webSocketTask;
    @Autowired
    private WebSocketServer webSocketServer;


    @Override
    public OrderSubmitVO sumbitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前用户数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list == null || list.size() == 0) {
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
//向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orderMapper.insert(orders);
        //向订单明细表插入N个数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
//清空当前购物车数据
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder().
                id(userId).orderTime(orders.getOrderTime()).orderAmount(orders.getAmount()).orderNumber(orders.getNumber()).build();
        return orderSubmitVO;
    }

//    /**
//     * 订单支付
//     *
//     * @param ordersPaymentDTO
//     * @return
//     */
//    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
//    }

    /**
     * 订单支付（修改后：跳过微信支付，直接标记成功）
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 模拟支付成功，直接更新订单状态
        Orders order = new Orders();
        order.setNumber(ordersPaymentDTO.getOrderNumber());
        order.setStatus(Orders.PAID);
        order.setPayStatus(Orders.PAID);
        order.setCheckoutTime(LocalDateTime.now());

        // 更新订单状态为已支付
        orderMapper.update(order);

        // 构造支付成功返回对象
        OrderPaymentVO vo = new OrderPaymentVO();
        vo.setNonceStr("模拟支付成功");
        vo.setPaySign("模拟签名");
        vo.setTimeStamp(System.currentTimeMillis() + "");
        vo.setSignType("RSA");
        vo.setPackageStr("prepay_id=wx_mock_prepay_id");

        // 记录支付日志（可选）
        log.info("订单支付成功，订单号：{}，用户ID：{}，时间：{}",
                ordersPaymentDTO.getOrderNumber(), userId, LocalDateTime.now());
        paySuccess(order.getNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    @Override
    public PageResult page(OrdersPageQueryDTO ordersPageQueryDTO) {

        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        Long total = page.getTotal();
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVoList = getOrderVoList(page);
        return new PageResult(total, orderVoList);
    }


    private List<OrderVO> getOrderVoList(Page<Orders> page) {
        List<OrderVO> orderVoList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVoList.add(orderVO);
            }
        }
        return orderVoList;
    }

    //将订单信息表内容进行拼接
    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getOrderById(orders.getId());
        List<String> orderDishesStr = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishesStr);
    }

    //查看订单详情 根据订单ID
    @Override
    public OrderVO detail(Long id) {
        Orders orders = orderMapper.getOrdersById(id);
        OrderVO orderVO = new OrderVO();
        List<OrderDetail> orderDetailList = orderDetailMapper.getOrderById(orders.getId());
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    //    业务规则：
//- 待支付和待接单状态下，用户可直接取消订单
//- 商家已接单状态下，用户取消订单需电话沟通商家
//- 派送中状态下，用户取消订单需电话沟通商家
//- 如果在待接单状态下取消订单，需要给用户退款
//- 取消订单后需要将订单状态修改为“已取消”
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //查询订单
        Orders orders = orderMapper.getOrdersById(ordersCancelDTO.getId());
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //支付状态
        Integer status = orders.getStatus();
        if (status.equals(1) || status.equals(2)) {
            orders.setStatus(Orders.CANCELLED);

            if (status.equals(2)) {
                orders.setPayStatus(2);
//                throw new RuntimeException("给用户退款");
            }
            orders.setCancelReason(ordersCancelDTO.getCancelReason());
            orders.setCancelTime(LocalDateTime.now());
        } else if (status > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderMapper.update(orders);
    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getOrdersById(id);
        if (orders.getStatus() == Orders.COMPLETED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.getOrdersById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = orders.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//                     log.info("申请退款：{}", refund);}

        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            orders.setStatus(Orders.CANCELLED);
            orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
            orders.setCancelTime(LocalDateTime.now());
        }
        orderMapper.update(orders);


    }

    @Override
    public void delevery(Long id) {
        Orders orders = orderMapper.getOrdersById(id);
        if (orders.getStatus().equals(Orders.CONFIRMED)) {
            orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
            orders.setId(orders.getId());
            orderMapper.update(orders);
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public PageResult pageUser(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        List<OrderVO> orderVOList = new ArrayList<>();
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<Orders> list = page.getResult();
        for (Orders orders : list) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            orderVOList.add(orderVO);
            List<OrderDetail> orderDetail = orderDetailMapper.getOrderById(orders.getId());
            orderVO.setOrderDetailList(orderDetail);
        }
        return new PageResult(page.getTotal(), orderVOList);
    }

    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getOrdersById(id);
        if (orders == null || orders.getStatus().equals(Orders.PENDING_PAYMENT)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号" + orders.getNumber());
        //将 map 对象转为 JSON 字符串：
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);


    }
}

